THERMAL BARRIER COATING WITH IMPROVED UNDERLAYER AND PIECES COATED WITH SAID THERMAL BARRIER

• Main Authors: LEGER, JACQUES LOUIS, FOURNES, JEAN-PAUL, MANESSE, DENIS GEORGES, JOSSO, PIERRE, ALPERINE, SERGE ALEXANDRE, MALIE, ANDRE HUBERT LOUIS
• Format: Patent
• Language: English; French
• Published: 29.08.1997
• Edition: 6
• Subjects: APPARATUS THEREFOR; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; ELECTROFORMING; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

Le revêtement de barrière thermique pour substrat en superalliage utilisé notamment dans les turbomachines comportant un revêtement céramique et une sous-couche interposée entre le substrat et la céramique, est caractérisé en ce que la sous-couche est composée d'un aluminiure de nickel et/ou de cobalt contenant au moins un métal de la mine du platine et au moins un métal promoteur de la formation d'une couche d'oxyde constitué de la variété allotropique .alpha. de l'alumine.